Results 61 to 70 of about 2,146 (234)

Hybrid propulsion technology program: Phase 1. Volume 3: Thiokol Corporation Space Operations [PDF]

Three candidate hybrid propulsion (HP) concepts were identified, optimized, evaluated, and refined through an iterative process that continually forced improvement to the systems with respect to safety, reliability, cost, and performance criteria. A full
Schuler, A. L., Wiley, D. R.
core   +1 more source

Investigating Premature Ignition of Thruster Pressure Cartridges by Vibration-Induced Electrostatic Discharge [PDF]

, 2010
Pyrotechnic thruster pressure cartridges (TPCs) are used for aeroshell separation on a new NASA crew launch vehicle. Nondestructive evaluation (NDE) during TPC acceptance testing indicated that internal assemblies moved during shock and vibration testing
Saulsberry, Regor, Woods, Stephen S.
core   +1 more source

Throttleable Solid Propellants Through Embedded Shape Memory Alloy and Resistance Wires

Propellants, Explosives, Pyrotechnics, Volume 50, Issue 3, March 2025.
Throttling behavior of expanding propellants ABSTRACT Solid propellants are used in propulsion systems for their high performance, feasibility to manufacture, long shelf life, and ease of storage and handling; however, they are limited by the inability to actively control the burning rate.
Derek K. Messer, Cohen T. Nunes, Metin Örnek, Steven F. Son   +3 more
wiley   +1 more source

Investigations of the mechanical response of dummy HTPB propellant grain under ultrahigh acceleration overload conditions using onboard flight-test measurements

Defence Technology
In this paper, to study the mechanical responses of a solid propellant subjected to ultrahigh acceleration overload during the gun-launch process, specifically designed projectile flight tests with an onboard measurement system were performed.
Yiming Zhang, Ningfei Wang, Weihua Ma, Ran Wang, Long Bai, Yi Wu   +5 more
doaj   +1 more source

Segmentation of RDX and TNT in X‐Ray Computed Tomography Reconstructions of Melt‐Cast Explosives

Propellants, Explosives, Pyrotechnics, Volume 50, Issue 2, February 2025.
Flow chart outlining our process for x‐ray CT data segmentation and quantitative anlayses of explosive microstructures. ABSTRACT Three‐dimensional mesoscale characterization of heterogeneous melt‐cast high explosives is challenging because of the difficulty differentiating binder from explosive crystals: two functionally different materials which are ...
Brian M. Rogers, Anthony J. Hardy, Keith R. Coffee, Fowzia Zaka, John D. Sain, Seemeen S. Karimi, Franco J. Gagliardi, Jolyon A. Browne, Joseph W. Tringe   +8 more
wiley   +1 more source

Estudo da decomposição térmica de propelente sólido compósito de baixa emissão de fumaça Study of thermal decomposition of a smokelles propellant

Química Nova, 2008
The thermal decomposition of hydroxyl-terminated polybutadiene (HTPB)/ammonium nitrate (AN) based propellants, so called smokeless formulations, and raw materials were investigated by differential scanning calorimetry (DSC) and thermogravimetry (TG). The
Jony Andrade, Antonio Gonçalves Frutuoso, Koshun Iha, José Atílio Fritz Fidel Rocco, Eduardo M. Bezerra, Jivaldo do Rosário Matos, Maria Encarnación Vázquez Suárez-Iha   +6 more
doaj   +1 more source

Storage of solid propellants in a dry environment [PDF]

Storage of solid propellants in either a dry or a vacuum environment causes a significantly greater increase in the propellants' modulus and maximum tensile strength than does ambient storage.
Udlock, D. E.
core   +1 more source

Resistive Heating and Thermal Decomposition of an Additively Manufacturable Electrically Conductive Explosive

Propellants, Explosives, Pyrotechnics, Volume 50, Issue 1, January 2025.
Abstract The ability to transmit electrical signals through high explosive charges without using dense metal conductors could enable continuous monitoring of explosive charges with internally embedded sensors. With the sensor materials themselves being energetic, the impact on the intended detonation performance of the charge can be minimized. Embedded
Wesley W. Chapman, Garon M. Young, Gabriel A. Montoya, Terry R. Salyer, Steven F. Son   +4 more
wiley   +1 more source

Numerical study of cook-off temperature and ignition dynamics in high-energetic materials

Academia Engineering
This study presents an approach for predicting temperatures and ignition time during the cook-off process of solid propellants, with a focus on identifying potential hot spots and conduction losses.
Mukhtiar Ahmed, Yang Yang, Binguang Niu, Xiaoxing Liu   +3 more
doaj   +1 more source

Alternate propellants for the space shuttle solid rocket booster motors [PDF]

As part of the Shuttle Exhaust Effects Panel (SEEP) program for fiscal year 1973, a limited study was performed to determine the feasibility of minimizing the environmental impact associated with the operation of the solid rocket booster motors (SRBMs ...

core   +1 more source